Stapling machine



Patented Dec. 1, 1942 UNHTED S'i'd'ihfi i fil'i'hbi'i OFFICE s'rArLmG Macrame Robert F. Stepbach, Binghamton, Y assignor,

by mesne assignments, to The Greif Bros. Cooperage Corporation, Cleveland, Ohio Application May 8, 1940, Serial No; 334,014

4 Claims.

This invention relates to stapling machines for stapling the heads into barrels and has for its principal object to so construct the machine that it may be used on different types of barrels and adjusted to various sizes thereof.

Another object of this invention is to provide the magazine of the stapling machine with novel guiding means which keep the staples from jamming at the bottom thereof.

A further object of this invention is to provide the stapling machine with means that will keep the staples from bending when they are driven thru hoops which offer excessive resistance to their penetration by the staples.

All these and other objects and attendant advantages of this invention will become more readily apparent from the detailed description thereof which follows, reference being'had to the accompanying drawing in which I Figure 1 is a side elevation of the staplingmachine embodying the invention, the stapling machine being shown in place on a barrel ready to have a staple driven thru the chime of the barrel and its metal hoop into the head thereof.

Figure 2 is a front elevation of the stapling machine as it appears on top of a barrel.

Figure 3 is a top plan view of the stapling machine and a portion of the barrel in which it is supported.

Figure 4 is a horizontal sectional view taken on the line ix-4r of Figure 1.

Figure 5 is an enlarged vertical sectional view taken on the line 5:13-51: of Figure 3.

Figure 6 is a vertical sectional view taken on the line Bra-6a: of Figure 4.

The subject matter of the present invention is an improvement on the mechanism illustrated and described in Patent No. 1,881,474 Gibbs which serves to make this stapling machine more efiicient in its operation and adaptable for use in stapling the head into different types and sizes of barrels.

The stapling machine comprises the head I which embodies the staple driving mechanism as will hereinafter be described. Projecting upwardly from the head is the staple magazine 2 and projecting rearwardly of the head is the supporting bar 3. The operating lever 4 is bifurcated and extends on each side of the staple magazine to the rear thereof where it is provided with the handle 5. The forward portion of the operating lever extends angularly toward the bottom of the head I on each side thereof where it is pivotally attached to the head by means of a pair of links 6, 6.

In the head I are provided the driver tracks I and 8 and the driver 9 is mounted to slide between them. The latter projects laterally thru the slots I0, II] in the sides of the head I and is connected to the sides of the operating lever by a suitable bolt H. In this way the swinging movement of the operating lever causes the driver to move between the tracks I and 8 and in its movement in one direction forces the lowermost staple in the magazine out of the head and thru thehoop IZand chime I3 of the barrel into the rim I 4 of the head.

The staples used in the machine are temporarily held together in blocks, that is a number of them are temporarily held together one on top of the other by means of an adhesive or an adhesive combined with a binding material such as paper. Each staple must therefore be separated from its block at the time it is forced out of the magazine into the barrel as above described. In order to facilitate this and prevent jamming of the-staple as it is being forced from the magazine',*the pointed ends of the staple in their movement from the magazine are forced to slide under the inclined lugs I6 which cause these pointed ends to-be forced downwardly into the guide groove Il whenever the pointed ends of the lowermost staple are not properly aligned with the driver in the guide groove. driver. The lugs it are inclined up and down and thus provide wedges which enter between the points of the two lowermost staple of the staple block when the bottom end of the staple block is forced thereagainst. In this Way the points of the lowermost staple are pried loose from the staple block to be deflected into the guide groove as above pointed out. The sidesof the guide groove I! extend slightly angularly toward the middle at the end of the guide groove as indicated at I8 in order to engage the sides of the staple and keep them from spreading outwardly when they are forced out of the guide groove into the hoop and chime of the barrel.

The proper support and alignment of the head I of the stapling machine is provided by the supporting block I9 which is adjustably mounted on the head at the bottom thereof. For adjustment the supporting block is adapted to slide on the under side of the rear of the head I and for this purpose carries the clamping bolt 20 which passes thru the vertical opening 2| in the head and is suspended from the movable clamping bar 22. In this way the supporting block may be released by loosening the clamping bolt and then moved laterally on the head for adjustment. The rear of the supporting block is provided with the depending back stop 23 which is adapted to engage behind the rim M of the barrel head 25. It is the resistance ofiered by this back stop which holds the head of the stapling machine against endwise movement when the staple is driven into the hoop and chime of the barrel and the rim of the barrel head. This back stop is therefore moved against the inside of the rim when the stapling machine is placed on the barrel prior to the stapling operation.

A rectangular cam block 26 is eccentrically mounted in the rear of the head so that either one or the other of the eccentrically arranged sides of this block may be turned to have the supporting block adjusted for contact thereagainst in order to resist the pressure exerted bythe driver in driving the staple into the head. In this way the supporting block is firmly backed by the cam block for the various thicknesses of the rim of difierent size or form of barrel heads.

I claim:

1. In a stapling machine for support on a barrel head, the combination of a stapling head having a staple driving mechanism, an adjustable supporting member at the bottom of said stapling head adapted to rest on the rim of the barrel head to support the stapling machine on the barrel head and locate the. staple driving mechanism onthe outside of the barrel and substantially in the plane of the barrel head, anda pressure resisting shoulder depending from said supporting member and arranged to have the edge of the barrel extend between the driving mechanism and said shoulder to cause said shoulder to be drawn against the inside of the rim of the barrel head when a staple is forced by the staple driving mechanism into the barrel and the edge of the barrel head. I

2. In a stapling machine the combination of a stapling head having a guide groove, a magazine extending upwardly from said guide groove adapted to hold a staple block with the staples ermost staple from the staple block by moving its pointed ends against said wedge shaped defleeting cam and causing said deflecting cam to pry the lowermost staple from the staple block and direct the pointed ends of the staple into said groove.

3. In a stapling machine for support on a barrel head, the combination of a stapling head having a staple driving mechanism, an adjustable supporting member at the bottom of said stapling head adapted to rest on the rim of the barrel head to locate the staple driving mechanism on the outside of the barrel substantially in the plane of the barrel head, a pressure resisting shoulder depending from said supporting member so as to engage and be drawn against the inside of the rim of the barrel head when a staple is forced by the stapling mechanism into the barrel and the edge of the barrel head and to increase or decrease the space between the staple driving mechanism and the pressure resisting shoulder on the movement of said supporting member, and a cam member in said head adapted to variably engage said supporting member.

4. In a stapling machine for support on a barrel head, the combination of a stapling head having a staple driving mechanism, an adjustable supporting memberat the bottom of the stapling head adapted to rest'on the barrel adjacent the substantially parallel to said guide groove, and a i substantially wedge shaped deflecting cam at the bottom of said magazine facing the pointed ends of the lowermost of the staples of the staple block above said groove, and a driver severing the low- 7 rim to support the stapling machine on the barrel head and locate the staple driving mechanism on the outside of the barrel and substantially in the plane of the barrel head, a pressure resisting shoulder depending from said supporting member and arranged to have the edge of the barrel extend between thedriving mechanism and said shoulder to cause said shoulder to be drawn against the inside of the rim of the barrel head when a staple is forced by the staple driving mechanism into the barrel and the edge of the barrel head, a' handle for operating said staple driving mechanism movable toward the end of the barrel and a bar attached to said head and extending across said barrel head to rest on the edge of the barrel diametrically opposite to the head.

. ROBERT F. STEPBACH. 

